Improvement in pipe-cutters



D.v HARRIGAN. Improvement in Pipe-Cutters.l

Patented May 16, 1871.`

UNITED STAT-Es PATENT OEEIGE.

DENNIS HARRIGAN, OF NORTH SOMERVILLE'ASSIGNOR TO HIMSELF AND JOEL GAY,OF CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN PIPE-CUTTERS.

Specification forming part of Letters Patent No. 114,939, dated May 16,1871.

To all to lwhom these presents may come:

Be it known that I, DENNIS HARRIGAN, of North Somerville, in the countyof Middlesex and State of Massachusetts, have invented a new and usefulImprovement in Pipe-Outters; and do hereby declare the same to be fullydescribed iu the-following specification and represented in theaccompanying drawing, of which- Figure l is a side elevation of a wrenchhaving my invention applied thereto. Figs. 2 and 3 are end views of thedevice as detached from the wrench. Fig. 4L is a bottom view thereof;and Fig. 5 is a transverse section taken through the chisel and itsadjusting feed-screw.

The object of my invention is to provide a simple and durable devicewhich can be readily applied to one of the jaws of an ordinary wrench,and thereby convert the latter into an effective implement for cuttingoff gas and other pipes; and my invention consists in combining anordinary screw-wrench in a hollow frame or case provided with an angularabutment or recessed jaw, and having a chisel or cutter working throughthe same, and regulated by a feed-screw, and furnished with meanswhereby the said abutment may be adj usted in accordance with the sizeor diameter of the pipe to be severed; also, in the combination of suchwith an ordinary screw-wrench.

In Fig. l of the drawing I have shown an ordinary screw-wrench with myinvention applied thereto. In such figure, A is the xed, and B themovable, jaw; C, the shank of the fixed jaw, and D the handle of thewrench, the said movable jaw being applied to the shank Gand providedwith means for moving it both toward and away from the stationary jaw inthe usual manner. E is a hollow frame,

having a rectangular or other proper shaped chamber, a, formed within itof a suitable size to receive and iit upon the fixed jaw of the wrench.s is a thin iiat spring, which is affixed to the bottom of the saidchamber, and has its free end bearin g against the outer end of the saidfixed jaw, the object of such sprin g being to maintain the abutment orrecessed jaw and the movable jaw of the wrench'in connection With thepipe t0 be cut, should the latter vary from a true cylindrical shape. Aslot, b, is4

made through the bottom of the said chamber for the reception of theshank C, such slot having a width corresponding therewith.

On the under side of the said frame E an angular abutment or recessedjaw, c, is formed, the same extending transversely thereof and throughthe base of a standard or block, Gr, affixed to or forming a part of theframe or device, as shown in the drawing. This abutment or recessed jaw,in connection with the jaw B, serves to grasp and hold the pipe while it(the latter) is being acted upon by the cutter. The chisel H is disposedand works within a slot formed vertically through the said standard, asshown in Fig. 5.

p is a throat or chip-passage, arranged directly in front of the chisel,as seen in Fig. 4. The upper end of the shank of said chisel is bent ata right angle to its body, and its furA cated arms embrace the shank ofthe feedscrew 1, and bear against the two annular shoulders c c'thereof, as shown in Figs. 2 and 3. The said screw I works within acorresponding female screw formed in the stand ard G, and has athumb-bottom or milled head, J, by which the screw I may be moved eitherup or down, as may be desirable.

In order to enable the device to operate with equal facility upon alarger or smaller pipe, the said device is to be so formed and appliedto one jaw and shank of the wrench as to be capable of being movedlaterally with respect to the shank. To effect the proper adjustment andhold the said device in its proper position, a series of holes,j'ffff'j", are made through the rear lower part of the frame, with whicha pin, g', operates. The recessed jaw or abutment being adjusted withrespect to the shank of the wrench, the pin is placed in the properholes to maintain it in such position.

ter, a feed-screw, and angular abutment or recessed jaw, with ascrew-wrench, substantially as and for the purpose set forth.

2. In combination with the subject of the foregoin g clause, means ormechanism for adjusting the recessed jaw, as and for the purpose setforth.

DENNIS HARRIGAN. Witnesses:

F. P. HALE, F. C. HALE.

